Bitcoin 5-Minute Market Orderbook Depth — 2026-09-28

On 2026-09-28, full orderbook depth was captured for 288 Polymarket BTC 5-minute Up/Down market rounds — approximately 61,650 bid/ask snapshots totalling 407.6 MB of JSONL. Each snapshot lists every price level and size for both the Up and Down side.

288
Rounds recorded
~61,650
Depth snapshots
407.6 MB
Raw size
1.2¢
Avg opening spread
Up side, best ask − best bid

Replay the day's most active round

btc-updown-5m-1790597100_orderbook.jsonl produced 1.66 MB of snapshots — the deepest recording of 2026-09-28. Watch both books evolve from open to resolution: the Up-side spread tightened from 6¢ to 0¢ as the outcome crystallised. Bars show size at each level, scaled within each ladder.

4.98 min left
frame 1/48▸ auto-playing — drag to scrubUp-side spread: 6¢
UP token
4.98 min remaining
pricesize
0.91812.01
0.9107.11
0.89224
0.8820
0.8720
0.86242.58
0.85118.38
0.8427
0.83203.06
0.8220
0.8120
0.8167.04
spread6¢
0.748.15
0.7312
0.7212
0.7112
0.712
0.6912
0.6812
0.6712
0.6612
0.6512
0.6417
0.6312
DOWN token
4.98 min remaining
pricesize
0.3917
0.3812
0.3712
0.3617
0.3512
0.3412
0.3312
0.3212
0.3112
0.312
0.299.45
0.271,136.99
spread1¢
0.26144.86
0.2310
0.22200
0.2110
0.2103.79
0.1920
0.1820
0.17218
0.1639
0.15130.38
0.141,746
0.13102

Showing 48 sampled snapshots, 12 levels nearest the touch on each side. The raw JSONL carries the complete ladder — every level, every ~1.5 seconds, for both tokens.

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